# Size Reduction MCQ Questions & Answers

Size Reduction MCQs : This section focuses on the "Size Reduction". These Multiple Choice Questions (MCQs) should be practiced to improve the Size Reduction skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

4 screens can separate _____ differently sized particles.

A. 3
B. 4
C. 5
D. 6

Question 2

A ball mill uses _____

A. Impact
B. Attrition
C. Impact & Attrition
D. None of the mentioned

Question 3

A jaw crusher uses _____

A. Compression
B. Shear
C. Cutting
D. None of the mentioned

Question 4

Gyratory screens are used when it is a continuous operation to be handled and the amount of material to be handled is very high.

A. TRUE
B. FALSE

Question 5

In differential screen analysis, for calculating the particle size of the food particles on any one sieve, the average food particle size on that sieve is the mean of the screen opening of that sieve and the sieve below it.

A. TRUE
B. FALSE

Question 6

Kick's law is an intermediate between rittinger's law and bond's law.

A. TRUE
B. FALSE

Question 7

Statement 1: As mesh size increases, the aperture size decreases.

A. True, False
B. True, True
C. False, False
D. False, True

Question 8

Stationary screens can be used for wet particles.

A. TRUE
B. FALSE

Question 9

The overall effectiveness of sieve equipment is the _____ of the effectiveness of the underflow and the overflow separately.

B. Multiplication
C. Difference
D. Division

Question 10

Which of the following food operation does NOT use the principle of size reduction for its operation?

A. Slaughtering of birds for food
B. Trimming of fish to remove inedible portions
C. Mincing of meat
D. None of the mentioned

Question 11

Which of the following is an advantage of size reduction?

A. Enhanced heat/mass transfer
B. Intimate contact with certain food items
C. Enhanced heat/mass transfer & intimate contact with certain food items
D. None of the mentioned

Question 12

Which of the following is NOT a reason to affect the effectiveness of a screen?

A. Broken mesh wires
B. Insufficient time for food particles to pass through the sieve
C. Blocked apertures
D. None of the mentioned

Question 13

Which of the following is NOT true with respect to size reduction?

A. Size reduction is an energy inefficient process as the energy required for grinding is very high
B. Some of the energy liberated in the formation of new small surfaces is the grinding energy required by food material per unit surface area to form new surface areas and the rest is generally just heat
C. The crushing efficiency is inversely proportional to the surface created
D. None of the mentioned

Question 14

Which of the following is used for shredding meat in the food industry?

A. Ball mill
B. Hammer mill
C. Knife cutter
D. All of the mentioned

Question 15

Which of the following uses attrition?

A. Ball mill
B. Plate mill
C. Roller mill
D. All of the mentioned

Question 16

With respect to the Tyler series, which of the following is true?

A. The ratio of one mess size to the intermediate mesh will have the ratio of 4th root of 2
B. Intermediate messes cannot be accommodated in the Tyler series
C. Intermediate meshes can be accommodated in British series only
D. None of the mentioned

Question 17

According to Kick, the work required for crushing a mass of material is ____

A. Zero
B. Constant
C. Unity
D. Infinite

Question 18

According to Rittingers law, work required is proportional to _________

A. Energy Consumed
B. Surface area created
C. Final Volume
D. Initial feed

Question 19

Following Rittingers law, Crushing efficiency is ____

A. Independent of feed material
B. Independent of size of feed and product
C. Independent of energy consumed
D. Independent of area

Question 20

Kick’s law holds well for ____

A. Fine crushing
B. Simple crushing
C. Full crushing
D. Coarse crushing

Question 21

On which of the given, Kick’s law is based?

A. Cumulative analysis
B. Frequency analysis
C. Stress analysis
D. Screen analysis

Question 22

Rittingers law is applicable only when _____

A. New particles are created
B. New surface area is created
C. Energy is created
D. Energy is absorbed